Zenith El Primero Tourbillon Chronomaster 49.2520.4035/98.R576 Limited Edition of 150. 45 mm black ceramic case. Black and grey dial features 30-minute counter at 3 o’clock, 12-hour counter at 6 o’clock, 1-minute Tourbillon cage at 11 o’clock. Automatic Swiss Made. Zenith Caliber El Primero 4035D, based on El Primero 400, 35 jewels, 381 parts, estimated power reserve of 50 hours. Black perforated rubber strap with double folding buckle.